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Nighthawk has increased its drill program to 35,000 metres for the year, up from the previously forecast 25,000 metres, which makes it the largest drill program in the explorer’s history.

The refinery's output could be doubled to 5,000 t/y cobalt contained in sulphate.

For all the deposits, the indicated resource is 3.2 million tonnes averaging 6.33 g/t gold and containing 643,000 oz. of gold.

Underground mining rates are to reach 1,200 t/d in 2020, and the company is seeking ways to reach that level before the end of 2019.

Canada's Nutrien Ltd, the world's biggest producer of potash fertilizer, said on Tuesday that it was evaluating whether to expand its annual production capacity by 5 million tonnes after 2023.

Shares of Delrey Metals surged by 17% on Tuesday morning following positive re-assay results from its Four Corners iron-titanium-vanadium project in Newfoundland.

Notable drill results include 393 g/t gold over 2.2 metres, 31g/t gold over 6.1 metres and 82.9g/t gold over 2.3 metres.

President and CEO Mark Bristow said the company expected to complete a feasibility study for the project, which could extend the life of the mine into the 2030s.

The Vancouver-based miner intends to use the proceeds for its Kutcho copper-zinc project in northern BC.